simple program of class

 BOOK Details program using class in PHP:

class Book {

  public $title;

  private $author;

  private $pages;

  public function __construct($title, $author, $pages) {

    $this->title = $title;

    $this->author = $author;

    $this->pages = $pages;

  }

  public function getAuthor() {

    return $this->author;

  }

  public function setAuthor($newAuthor) {

    $this->author = $newAuthor;

  }

  public function getPages() {

    return $this->pages;

  }

  public function getInfo() {

    return "Title: " . $this->title . ", Author: " . $this->getAuthor() . ", Pages: " . $this->getPages();

  }

}

// Create two book objects

$book1 = new Book("The Lord of the Rings", "J.R.R. Tolkien", 1137);

$book2 = new Book("Pride and Prejudice", "Jane Austen", 226);

// Access and modify properties (note private author requires getter/setter)

echo $book1->getInfo() . PHP_EOL; // Outputs: Title: The Lord of the Rings, Author: J.R.R. Tolkien, Pages: 1137

$book1->setAuthor("Frodo Baggins"); // Change author playfully

echo $book1->getInfo() . PHP_EOL; // Outputs: Title: The Lord of the Rings, Author: Frodo Baggins, Pages: 1137

// Demonstrate private property protection

echo "Trying to access private author directly: " . $book1->author . PHP_EOL; // Throws error: Cannot access private property Book::$author